<template>
  <transition name="modal">
    <div v-if="show" class="modal-mask">
      <div class="modal-wrapper">
        <div class="modal-container">
          <!-- 头 -->
          <div class="modal-header">
            <slot name="header"> default Header </slot>
          </div>
          <!-- 内容 -->
          <div class="modal-body">
            <slot name="body"> this is default Body</slot>
          </div>
          <!-- footer -->
          <div class="modal-footer">
            <slot name="footer">
              default footer
              <button class="modal-default-button" @click="confirm">OK</button>
              <button class="modal-default-button" @click="close">
                Cancel
              </button>
            </slot>
          </div>
        </div>
      </div>
    </div>
  </transition>
</template>

<script setup>
import { nextTick } from 'vue';
const props = defineProps({
  show: Boolean,
});
// 声明触发的事件
const emit = defineEmits(['close']);
function close(){
    emit('close');
}
function confirm(){
    alert('confirm')
    nextTick(()=>{
        emit('close')
    })
}
</script>
<style>
.modal-mask {
  /* 遮罩层 */
  position: fixed;
  z-index: 999;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: table;
  transition: opacity 0.3s ease;
}
.modal-wrapper {
  display: table-cell;
  vertical-align: middle;
}
.modal-container {
  width: 300px;
  margin: 0 auto;
  padding: 20px 30px;
  background-color: #fff;
  border-radius: 5px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.33);
  transition: all 0.3s ease;
}
/* 头 */
.modal-header h3 {
  margin-top: 0;
  color: #42b983;
}
/* body */
.modal-body {
  margin: 20px 0;
}
.modal-default-button {
  float: right;
  margin: 0 10px;
}
/* 过度效果 */
/*
 * 对于 transition="modal" 的元素来说
 * 当通过 Vue.js 切换它们的可见性时
 * 以下样式会被自动应用。
 *
 * 你可以简单地通过编辑这些样式
 * 来体验该模态框的过渡效果。
 */
.modal-enter-from {
  opacity: 0;
}
.modal-leave-to {
  opacity: 0;
}
.modal-enter-from .modal-container,
.modal-leave-to .modal-container {
  -webkit-transform: scale(1.3);
  transform: scale(1.3);
}
</style>
